[INFO] cloning repository https://github.com/Askaholic/rust-intro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Askaholic/rust-intro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAskaholic%2Frust-intro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAskaholic%2Frust-intro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 863aaad62137c038592c5392e56e8b015f301c74
[INFO] testing Askaholic/rust-intro against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAskaholic%2Frust-intro" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Askaholic/rust-intro on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Askaholic/rust-intro
[INFO] finished tweaking git repo https://github.com/Askaholic/rust-intro
[INFO] tweaked toml for git repo https://github.com/Askaholic/rust-intro written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Askaholic/rust-intro already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.41
[INFO] [stderr]   Downloaded rand v0.5.0
[INFO] [stderr]   Downloaded rand_core v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d1adf6d53bdb3bf3868c852f4b7cc063178d2251dc841ab2a31bf766176ac136
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d1adf6d53bdb3bf3868c852f4b7cc063178d2251dc841ab2a31bf766176ac136", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1adf6d53bdb3bf3868c852f4b7cc063178d2251dc841ab2a31bf766176ac136", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1adf6d53bdb3bf3868c852f4b7cc063178d2251dc841ab2a31bf766176ac136", kill_on_drop: false }`
[INFO] [stdout] d1adf6d53bdb3bf3868c852f4b7cc063178d2251dc841ab2a31bf766176ac136
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d50cb45fba53073dd0345f7f2dfc1f1bd22db6cf833e5a5b52884d32f01324f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0d50cb45fba53073dd0345f7f2dfc1f1bd22db6cf833e5a5b52884d32f01324f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.2.0
[INFO] [stderr]    Compiling libc v0.2.41
[INFO] [stderr]    Compiling rand v0.5.0
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `guess`
[INFO] [stdout]   --> src/guess.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn guess() {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_guess`
[INFO] [stdout]   --> src/guess.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn get_guess() -> Result<i64, std::num::ParseIntError> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.44s
[INFO] running `Command { std: "docker" "inspect" "0d50cb45fba53073dd0345f7f2dfc1f1bd22db6cf833e5a5b52884d32f01324f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d50cb45fba53073dd0345f7f2dfc1f1bd22db6cf833e5a5b52884d32f01324f", kill_on_drop: false }`
[INFO] [stdout] 0d50cb45fba53073dd0345f7f2dfc1f1bd22db6cf833e5a5b52884d32f01324f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 23758117c7626ce5f73a9299511e5a4da0c918141f20937e9c2abae496f70b0b
[INFO] running `Command { std: "docker" "start" "-a" "23758117c7626ce5f73a9299511e5a4da0c918141f20937e9c2abae496f70b0b", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `guess`
[INFO] [stdout]   --> src/guess.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn guess() {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_guess`
[INFO] [stdout]   --> src/guess.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn get_guess() -> Result<i64, std::num::ParseIntError> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "23758117c7626ce5f73a9299511e5a4da0c918141f20937e9c2abae496f70b0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23758117c7626ce5f73a9299511e5a4da0c918141f20937e9c2abae496f70b0b", kill_on_drop: false }`
[INFO] [stdout] 23758117c7626ce5f73a9299511e5a4da0c918141f20937e9c2abae496f70b0b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c4d045029778b933365be8ff43b91854db8f15235af71db4eab4b86becb316bf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c4d045029778b933365be8ff43b91854db8f15235af71db4eab4b86becb316bf", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `guess`
[INFO] [stderr]   --> src/guess.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub fn guess() {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_guess`
[INFO] [stderr]   --> src/guess.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn get_guess() -> Result<i64, std::num::ParseIntError> {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/hello_world-3f3f4b37704d152c
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c4d045029778b933365be8ff43b91854db8f15235af71db4eab4b86becb316bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4d045029778b933365be8ff43b91854db8f15235af71db4eab4b86becb316bf", kill_on_drop: false }`
[INFO] [stdout] c4d045029778b933365be8ff43b91854db8f15235af71db4eab4b86becb316bf